| /* |
| Copyright (C) 2004, 2005, 2006, 2007, 2008 Nikolas Zimmermann <zimmermann@kde.org> |
| 2004, 2005, 2006, 2007 Rob Buis <buis@kde.org> |
| |
| This file is part of the KDE project |
| |
| This library is free software; you can redistribute it and/or |
| modify it under the terms of the GNU Library General Public |
| License as published by the Free Software Foundation; either |
| version 2 of the License, or (at your option) any later version. |
| |
| This library is distributed in the hope that it will be useful, |
| but WITHOUT ANY WARRANTY; without even the implied warranty of |
| MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| Library General Public License for more details. |
| |
| You should have received a copy of the GNU Library General Public License |
| along with this library; see the file COPYING.LIB. If not, write to |
| the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, |
| Boston, MA 02110-1301, USA. |
| */ |
| |
| #include "config.h" |
| |
| // Dump SVGElementInstance object tree - useful to debug instanceRoot problems |
| // #define DUMP_INSTANCE_TREE |
| |
| // Dump the deep-expanded shadow tree (where the renderes are built from) |
| // #define DUMP_SHADOW_TREE |
| |
| #if ENABLE(SVG) |
| #include "SVGUseElement.h" |
| |
| #include "CSSStyleSelector.h" |
| #include "CString.h" |
| #include "Document.h" |
| #include "Event.h" |
| #include "EventListener.h" |
| #include "HTMLNames.h" |
| #include "NodeRenderStyle.h" |
| #include "RegisteredEventListener.h" |
| #include "RenderSVGTransformableContainer.h" |
| #include "SVGElementInstance.h" |
| #include "SVGElementInstanceList.h" |
| #include "SVGGElement.h" |
| #include "SVGLength.h" |
| #include "SVGPreserveAspectRatio.h" |
| #include "SVGSMILElement.h" |
| #include "SVGSVGElement.h" |
| #include "SVGSymbolElement.h" |
| #include "XLinkNames.h" |
| #include "XMLSerializer.h" |
| |
| namespace WebCore { |
| |
| SVGUseElement::SVGUseElement(const QualifiedName& tagName, Document* doc) |
| : SVGStyledTransformableElement(tagName, doc) |
| , SVGTests() |
| , SVGLangSpace() |
| , SVGExternalResourcesRequired() |
| , SVGURIReference() |
| , m_x(this, SVGNames::xAttr, LengthModeWidth) |
| , m_y(this, SVGNames::yAttr, LengthModeHeight) |
| , m_width(this, SVGNames::widthAttr, LengthModeWidth) |
| , m_height(this, SVGNames::heightAttr, LengthModeHeight) |
| { |
| } |
| |
| SVGUseElement::~SVGUseElement() |
| { |
| } |
| |
| SVGElementInstance* SVGUseElement::instanceRoot() const |
| { |
| return m_targetElementInstance.get(); |
| } |
| |
| SVGElementInstance* SVGUseElement::animatedInstanceRoot() const |
| { |
| // FIXME: Implement me. |
| return 0; |
| } |
| |
| void SVGUseElement::parseMappedAttribute(MappedAttribute* attr) |
| { |
| if (attr->name() == SVGNames::xAttr) |
| setXBaseValue(SVGLength(LengthModeWidth, attr->value())); |
| else if (attr->name() == SVGNames::yAttr) |
| setYBaseValue(SVGLength(LengthModeHeight, attr->value())); |
| else if (attr->name() == SVGNames::widthAttr) { |
| setWidthBaseValue(SVGLength(LengthModeWidth, attr->value())); |
| if (widthBaseValue().value(this) < 0.0) |
| document()->accessSVGExtensions()->reportError("A negative value for use attribute <width> is not allowed"); |
| } else if (attr->name() == SVGNames::heightAttr) { |
| setHeightBaseValue(SVGLength(LengthModeHeight, attr->value())); |
| if (heightBaseValue().value(this) < 0.0) |
| document()->accessSVGExtensions()->reportError("A negative value for use attribute <height> is not allowed"); |
| } else { |
| if (SVGTests::parseMappedAttribute(attr)) |
| return; |
| if (SVGLangSpace::parseMappedAttribute(attr)) |
| return; |
| if (SVGExternalResourcesRequired::parseMappedAttribute(attr)) |
| return; |
| if (SVGURIReference::parseMappedAttribute(attr)) |
| return; |
| SVGStyledTransformableElement::parseMappedAttribute(attr); |
| } |
| } |
| |
| void SVGUseElement::insertedIntoDocument() |
| { |
| SVGElement::insertedIntoDocument(); |
| buildPendingResource(); |
| } |
| |
| void SVGUseElement::removedFromDocument() |
| { |
| m_targetElementInstance = 0; |
| m_shadowTreeRootElement = 0; |
| SVGElement::removedFromDocument(); |
| } |
| |
| void SVGUseElement::svgAttributeChanged(const QualifiedName& attrName) |
| { |
| SVGStyledTransformableElement::svgAttributeChanged(attrName); |
| |
| if (!attached()) |
| return; |
| |
| if (attrName == SVGNames::xAttr || attrName == SVGNames::yAttr || |
| attrName == SVGNames::widthAttr || attrName == SVGNames::heightAttr || |
| SVGTests::isKnownAttribute(attrName) || |
| SVGLangSpace::isKnownAttribute(attrName) || |
| SVGExternalResourcesRequired::isKnownAttribute(attrName) || |
| SVGURIReference::isKnownAttribute(attrName) || |
| SVGStyledTransformableElement::isKnownAttribute(attrName)) { |
| buildPendingResource(); |
| |
| if (m_shadowTreeRootElement) |
| m_shadowTreeRootElement->setChanged(); |
| } |
| } |
| |
| void SVGUseElement::childrenChanged(bool changedByParser, Node* beforeChange, Node* afterChange, int childCountDelta) |
| { |
| SVGElement::childrenChanged(changedByParser, beforeChange, afterChange, childCountDelta); |
| |
| if (!attached()) |
| return; |
| |
| buildPendingResource(); |
| |
| if (m_shadowTreeRootElement) |
| m_shadowTreeRootElement->setChanged(); |
| } |
| |
| static bool shadowTreeContainsChangedNodes(SVGElementInstance* target) |
| { |
| if (target->needsUpdate()) |
| return true; |
| |
| for (SVGElementInstance* instance = target->firstChild(); instance; instance = instance->nextSibling()) |
| if (shadowTreeContainsChangedNodes(instance)) |
| return true; |
| |
| return false; |
| } |
| |
| void SVGUseElement::recalcStyle(StyleChange change) |
| { |
| if (attached() && changed() && shadowTreeContainsChangedNodes(m_targetElementInstance.get())) { |
| buildPendingResource(); |
| |
| if (m_shadowTreeRootElement) |
| m_shadowTreeRootElement->setChanged(); |
| } |
| |
| SVGStyledElement::recalcStyle(change); |
| |
| // The shadow tree root element is NOT a direct child element of us. |
| // So we have to take care it receives style updates, manually. |
| if (!m_shadowTreeRootElement || !m_shadowTreeRootElement->attached()) |
| return; |
| |
| // Mimic Element::recalcStyle(). The main difference is that we don't call attach() on the |
| // shadow tree root element, but call attachShadowTree() here. Calling attach() will crash |
| // as the shadow tree root element has no (direct) parent node. Yes, shadow trees are tricky. |
| if (change >= Inherit || m_shadowTreeRootElement->changed()) { |
| RefPtr<RenderStyle> newStyle = document()->styleSelector()->styleForElement(m_shadowTreeRootElement.get()); |
| StyleChange ch = Node::diff(m_shadowTreeRootElement->renderStyle(), newStyle.get()); |
| if (ch == Detach) { |
| ASSERT(m_shadowTreeRootElement->attached()); |
| m_shadowTreeRootElement->detach(); |
| attachShadowTree(); |
| |
| // attach recalulates the style for all children. No need to do it twice. |
| m_shadowTreeRootElement->setChanged(NoStyleChange); |
| m_shadowTreeRootElement->setHasChangedChild(false); |
| return; |
| } |
| } |
| |
| // Only change==Detach needs special treatment, for anything else recalcStyle() works. |
| m_shadowTreeRootElement->recalcStyle(change); |
| } |
| |
| #ifdef DUMP_INSTANCE_TREE |
| void dumpInstanceTree(unsigned int& depth, String& text, SVGElementInstance* targetInstance) |
| { |
| SVGElement* element = targetInstance->correspondingElement(); |
| ASSERT(element); |
| |
| String elementId = element->getIDAttribute(); |
| String elementNodeName = element->nodeName(); |
| String parentNodeName = element->parentNode() ? element->parentNode()->nodeName() : "null"; |
| String firstChildNodeName = element->firstChild() ? element->firstChild()->nodeName() : "null"; |
| |
| for (unsigned int i = 0; i < depth; ++i) |
| text += " "; |
| |
| text += String::format("SVGElementInstance this=%p, (parentNode=%s, firstChild=%s, correspondingElement=%s (%p), shadowTreeElement=%p, id=%s)\n", |
| targetInstance, parentNodeName.latin1().data(), firstChildNodeName.latin1().data(), elementNodeName.latin1().data(), |
| element, targetInstance->shadowTreeElement(), elementId.latin1().data()); |
| |
| for (unsigned int i = 0; i < depth; ++i) |
| text += " "; |
| |
| HashSet<SVGElementInstance*> elementInstances = element->instancesForElement(); |
| text += String::format("Corresponding element is associated with %i instance(s):\n", elementInstances.size()); |
| |
| HashSet<SVGElementInstance*>::iterator end = elementInstances.end(); |
| for (HashSet<SVGElementInstance*>::iterator it = elementInstances.begin(); it != end; ++it) { |
| for (unsigned int i = 0; i < depth; ++i) |
| text += " "; |
| |
| text += String::format(" -> SVGElementInstance this=%p, (refCount: %i, shadowTreeElement in document? %i)\n", |
| *it, (*it)->refCount(), (*it)->shadowTreeElement()->inDocument()); |
| } |
| |
| ++depth; |
| |
| for (SVGElementInstance* instance = targetInstance->firstChild(); instance; instance = instance->nextSibling()) |
| dumpInstanceTree(depth, text, instance); |
| |
| --depth; |
| } |
| #endif |
| |
| static bool isDisallowedElement(Node* element) |
| { |
| #if ENABLE(SVG_FOREIGN_OBJECT) |
| // <foreignObject> should never be contained in a <use> tree. Too dangerous side effects possible. |
| if (element->hasTagName(SVGNames::foreignObjectTag)) |
| return true; |
| #endif |
| #if ENABLE(SVG_ANIMATION) |
| if (SVGSMILElement::isSMILElement(element)) |
| return true; |
| #endif |
| |
| return false; |
| } |
| |
| static bool subtreeContainsDisallowedElement(Node* start) |
| { |
| if (isDisallowedElement(start)) |
| return true; |
| |
| for (Node* cur = start->firstChild(); cur; cur = cur->nextSibling()) { |
| if (subtreeContainsDisallowedElement(cur)) |
| return true; |
| } |
| |
| return false; |
| } |
| |
| void SVGUseElement::buildPendingResource() |
| { |
| String id = SVGURIReference::getTarget(href()); |
| Element* targetElement = document()->getElementById(id); |
| |
| if (!targetElement) { |
| // TODO: We want to deregister as pending resource, if our href() changed! |
| // TODO: Move to svgAttributeChanged, once we're fixing use & the new dynamic update concept. |
| document()->accessSVGExtensions()->addPendingResource(id, this); |
| return; |
| } |
| |
| // Do not build the shadow/instance tree for <use> elements living in a shadow tree. |
| // The will be expanded soon anyway - see expandUseElementsInShadowTree(). |
| Node* parent = parentNode(); |
| while (parent) { |
| if (parent->isShadowNode()) |
| return; |
| |
| parent = parent->parentNode(); |
| } |
| |
| SVGElement* target = 0; |
| if (targetElement && targetElement->isSVGElement()) |
| target = static_cast<SVGElement*>(targetElement); |
| |
| if (m_targetElementInstance) { |
| m_targetElementInstance->forgetWrapper(); |
| m_targetElementInstance = 0; |
| } |
| |
| // Do not allow self-referencing. |
| // 'target' may be null, if it's a non SVG namespaced element. |
| if (!target || target == this) { |
| m_shadowTreeRootElement = 0; |
| return; |
| } |
| |
| // Why a seperated instance/shadow tree? SVG demands it: |
| // The instance tree is accesable from JavaScript, and has to |
| // expose a 1:1 copy of the referenced tree, whereas internally we need |
| // to alter the tree for correct "use-on-symbol", "use-on-svg" support. |
| |
| // Build instance tree. Create root SVGElementInstance object for the first sub-tree node. |
| // |
| // Spec: If the 'use' element references a simple graphics element such as a 'rect', then there is only a |
| // single SVGElementInstance object, and the correspondingElement attribute on this SVGElementInstance object |
| // is the SVGRectElement that corresponds to the referenced 'rect' element. |
| m_targetElementInstance = new SVGElementInstance(this, target); |
| |
| // Eventually enter recursion to build SVGElementInstance objects for the sub-tree children |
| bool foundProblem = false; |
| buildInstanceTree(target, m_targetElementInstance.get(), foundProblem); |
| |
| // SVG specification does not say a word about <use> & cycles. My view on this is: just ignore it! |
| // Non-appearing <use> content is easier to debug, then half-appearing content. |
| if (foundProblem) { |
| m_targetElementInstance = 0; |
| m_shadowTreeRootElement = 0; |
| return; |
| } |
| |
| // Assure instance tree building was successfull |
| ASSERT(m_targetElementInstance); |
| ASSERT(m_targetElementInstance->correspondingUseElement() == this); |
| |
| // Setup shadow tree root node |
| m_shadowTreeRootElement = new SVGGElement(SVGNames::gTag, document()); |
| m_shadowTreeRootElement->setInDocument(); |
| m_shadowTreeRootElement->setShadowParentNode(this); |
| |
| // Spec: An additional transformation translate(x,y) is appended to the end |
| // (i.e., right-side) of the transform attribute on the generated 'g', where x |
| // and y represent the values of the x and y attributes on the 'use' element. |
| if (x().value(this) != 0.0 || y().value(this) != 0.0) { |
| String transformString = String::format("translate(%f, %f)", x().value(this), y().value(this)); |
| m_shadowTreeRootElement->setAttribute(SVGNames::transformAttr, transformString); |
| } |
| |
| // Build shadow tree from instance tree |
| // This also handles the special cases: <use> on <symbol>, <use> on <svg>. |
| buildShadowTree(target, m_targetElementInstance.get()); |
| |
| #if ENABLE(SVG) && ENABLE(SVG_USE) |
| // Expand all <use> elements in the shadow tree. |
| // Expand means: replace the actual <use> element by what it references. |
| expandUseElementsInShadowTree(m_shadowTreeRootElement.get()); |
| |
| // Expand all <symbol> elements in the shadow tree. |
| // Expand means: replace the actual <symbol> element by the <svg> element. |
| expandSymbolElementsInShadowTree(m_shadowTreeRootElement.get()); |
| |
| #endif |
| |
| // Now that the shadow tree is completly expanded, we can associate |
| // shadow tree elements <-> instances in the instance tree. |
| associateInstancesWithShadowTreeElements(m_shadowTreeRootElement->firstChild(), m_targetElementInstance.get()); |
| |
| // Eventually dump instance tree |
| #ifdef DUMP_INSTANCE_TREE |
| String text; |
| unsigned int depth = 0; |
| |
| dumpInstanceTree(depth, text, m_targetElementInstance.get()); |
| fprintf(stderr, "\nDumping <use> instance tree:\n%s\n", text.latin1().data()); |
| #endif |
| |
| // Eventually dump shadow tree |
| #ifdef DUMP_SHADOW_TREE |
| ExceptionCode ec = 0; |
| |
| PassRefPtr<XMLSerializer> serializer = XMLSerializer::create(); |
| |
| String markup = serializer->serializeToString(m_shadowTreeRootElement.get(), ec); |
| ASSERT(ec == 0); |
| |
| fprintf(stderr, "Dumping <use> shadow tree markup:\n%s\n", markup.latin1().data()); |
| #endif |
| |
| // Transfer event listeners assigned to the referenced element to our shadow tree elements. |
| transferEventListenersToShadowTree(m_targetElementInstance.get()); |
| |
| // The DOM side is setup properly. Now we have to attach the root shadow |
| // tree element manually - using attach() won't work for "shadow nodes". |
| attachShadowTree(); |
| } |
| |
| RenderObject* SVGUseElement::createRenderer(RenderArena* arena, RenderStyle*) |
| { |
| return new (arena) RenderSVGTransformableContainer(this); |
| } |
| |
| void SVGUseElement::attach() |
| { |
| SVGStyledTransformableElement::attach(); |
| |
| // If we're a pending resource, this doesn't have any effect. |
| attachShadowTree(); |
| } |
| |
| void SVGUseElement::detach() |
| { |
| SVGStyledTransformableElement::detach(); |
| |
| if (m_shadowTreeRootElement) |
| m_shadowTreeRootElement->detach(); |
| } |
| |
| static bool isDirectReference(Node* n) |
| { |
| return n->hasTagName(SVGNames::pathTag) || |
| n->hasTagName(SVGNames::rectTag) || |
| n->hasTagName(SVGNames::circleTag) || |
| n->hasTagName(SVGNames::ellipseTag) || |
| n->hasTagName(SVGNames::polygonTag) || |
| n->hasTagName(SVGNames::polylineTag) || |
| n->hasTagName(SVGNames::textTag); |
| } |
| |
| Path SVGUseElement::toClipPath() const |
| { |
| if (!m_shadowTreeRootElement) |
| const_cast<SVGUseElement*>(this)->buildPendingResource(); |
| |
| Node* n = m_shadowTreeRootElement->firstChild(); |
| if (n->isSVGElement() && static_cast<SVGElement*>(n)->isStyledTransformable()) { |
| if (!isDirectReference(n)) |
| // Spec: Indirect references are an error (14.3.5) |
| document()->accessSVGExtensions()->reportError("Not allowed to use indirect reference in <clip-path>"); |
| else |
| return static_cast<SVGStyledTransformableElement*>(n)->toClipPath(); |
| } |
| |
| return Path(); |
| } |
| |
| void SVGUseElement::buildInstanceTree(SVGElement* target, SVGElementInstance* targetInstance, bool& foundProblem) |
| { |
| ASSERT(target); |
| ASSERT(targetInstance); |
| |
| // A general description from the SVG spec, describing what buildInstanceTree() actually does. |
| // |
| // Spec: If the 'use' element references a 'g' which contains two 'rect' elements, then the instance tree |
| // contains three SVGElementInstance objects, a root SVGElementInstance object whose correspondingElement |
| // is the SVGGElement object for the 'g', and then two child SVGElementInstance objects, each of which has |
| // its correspondingElement that is an SVGRectElement object. |
| |
| for (Node* node = target->firstChild(); node; node = node->nextSibling()) { |
| SVGElement* element = 0; |
| if (node->isSVGElement()) |
| element = static_cast<SVGElement*>(node); |
| |
| // Skip any non-svg nodes or any disallowed element. |
| if (!element || isDisallowedElement(element)) |
| continue; |
| |
| // Create SVGElementInstance object, for both container/non-container nodes. |
| SVGElementInstance* instancePtr = new SVGElementInstance(this, element); |
| targetInstance->appendChild(instancePtr); |
| |
| // Enter recursion, appending new instance tree nodes to the "instance" object. |
| if (element->hasChildNodes()) |
| buildInstanceTree(element, instancePtr, foundProblem); |
| |
| // Spec: If the referenced object is itself a 'use', or if there are 'use' subelements within the referenced |
| // object, the instance tree will contain recursive expansion of the indirect references to form a complete tree. |
| if (element->hasTagName(SVGNames::useTag)) |
| handleDeepUseReferencing(static_cast<SVGUseElement*>(element), instancePtr, foundProblem); |
| } |
| |
| // Spec: If the referenced object is itself a 'use', or if there are 'use' subelements within the referenced |
| // object, the instance tree will contain recursive expansion of the indirect references to form a complete tree. |
| if (target->hasTagName(SVGNames::useTag)) |
| handleDeepUseReferencing(static_cast<SVGUseElement*>(target), targetInstance, foundProblem); |
| } |
| |
| void SVGUseElement::handleDeepUseReferencing(SVGUseElement* use, SVGElementInstance* targetInstance, bool& foundProblem) |
| { |
| String id = SVGURIReference::getTarget(use->href()); |
| Element* targetElement = document()->getElementById(id); |
| SVGElement* target = 0; |
| if (targetElement && targetElement->isSVGElement()) |
| target = static_cast<SVGElement*>(targetElement); |
| |
| if (!target) |
| return; |
| |
| // Cycle detection first! |
| foundProblem = (target == this); |
| |
| // Shortcut for self-references |
| if (foundProblem) |
| return; |
| |
| SVGElementInstance* instance = targetInstance->parentNode(); |
| while (instance) { |
| SVGElement* element = instance->correspondingElement(); |
| |
| if (element->getIDAttribute() == id) { |
| foundProblem = true; |
| return; |
| } |
| |
| instance = instance->parentNode(); |
| } |
| |
| // Create an instance object, even if we're dealing with a cycle |
| SVGElementInstance* newInstance = new SVGElementInstance(this, target); |
| targetInstance->appendChild(newInstance); |
| |
| // Eventually enter recursion to build SVGElementInstance objects for the sub-tree children |
| buildInstanceTree(target, newInstance, foundProblem); |
| } |
| |
| void SVGUseElement::alterShadowTreeForSVGTag(SVGElement* target) |
| { |
| String widthString = String::number(width().value(this)); |
| String heightString = String::number(height().value(this)); |
| |
| if (hasAttribute(SVGNames::widthAttr)) |
| target->setAttribute(SVGNames::widthAttr, widthString); |
| |
| if (hasAttribute(SVGNames::heightAttr)) |
| target->setAttribute(SVGNames::heightAttr, heightString); |
| } |
| |
| void SVGUseElement::removeDisallowedElementsFromSubtree(Node* subtree) |
| { |
| ASSERT(!subtree->inDocument()); |
| ExceptionCode ec; |
| Node* node = subtree->firstChild(); |
| while (node) { |
| if (isDisallowedElement(node)) { |
| Node* next = node->traverseNextSibling(subtree); |
| // The subtree is not in document so this won't generate events that could mutate the tree. |
| node->parent()->removeChild(node, ec); |
| node = next; |
| } else |
| node = node->traverseNextNode(subtree); |
| } |
| } |
| |
| void SVGUseElement::buildShadowTree(SVGElement* target, SVGElementInstance* targetInstance) |
| { |
| // For instance <use> on <foreignObject> (direct case). |
| if (isDisallowedElement(target)) |
| return; |
| |
| RefPtr<Node> newChild = targetInstance->correspondingElement()->cloneNode(true); |
| |
| // We don't walk the target tree element-by-element, and clone each element, |
| // but instead use cloneNode(deep=true). This is an optimization for the common |
| // case where <use> doesn't contain disallowed elements (ie. <foreignObject>). |
| // Though if there are disallowed elements in the subtree, we have to remove them. |
| // For instance: <use> on <g> containing <foreignObject> (indirect case). |
| if (subtreeContainsDisallowedElement(newChild.get())) |
| removeDisallowedElementsFromSubtree(newChild.get()); |
| |
| SVGElement* newChildPtr = 0; |
| if (newChild->isSVGElement()) |
| newChildPtr = static_cast<SVGElement*>(newChild.get()); |
| ASSERT(newChildPtr); |
| |
| ExceptionCode ec = 0; |
| m_shadowTreeRootElement->appendChild(newChild.release(), ec); |
| ASSERT(ec == 0); |
| |
| // Handle use referencing <svg> special case |
| if (target->hasTagName(SVGNames::svgTag)) |
| alterShadowTreeForSVGTag(newChildPtr); |
| } |
| |
| #if ENABLE(SVG) && ENABLE(SVG_USE) |
| void SVGUseElement::expandUseElementsInShadowTree(Node* element) |
| { |
| // Why expand the <use> elements in the shadow tree here, and not just |
| // do this directly in buildShadowTree, if we encounter a <use> element? |
| // |
| // Short answer: Because we may miss to expand some elements. Ie. if a <symbol> |
| // contains <use> tags, we'd miss them. So once we're done with settin' up the |
| // actual shadow tree (after the special case modification for svg/symbol) we have |
| // to walk it completely and expand all <use> elements. |
| if (element->hasTagName(SVGNames::useTag)) { |
| SVGUseElement* use = static_cast<SVGUseElement*>(element); |
| |
| String id = SVGURIReference::getTarget(use->href()); |
| Element* targetElement = document()->getElementById(id); |
| SVGElement* target = 0; |
| if (targetElement && targetElement->isSVGElement()) |
| target = static_cast<SVGElement*>(targetElement); |
| |
| // Don't ASSERT(target) here, it may be "pending", too. |
| if (target) { |
| // Setup sub-shadow tree root node |
| RefPtr<SVGElement> cloneParent = new SVGGElement(SVGNames::gTag, document()); |
| |
| // Spec: In the generated content, the 'use' will be replaced by 'g', where all attributes from the |
| // 'use' element except for x, y, width, height and xlink:href are transferred to the generated 'g' element. |
| transferUseAttributesToReplacedElement(use, cloneParent.get()); |
| |
| // Spec: An additional transformation translate(x,y) is appended to the end |
| // (i.e., right-side) of the transform attribute on the generated 'g', where x |
| // and y represent the values of the x and y attributes on the 'use' element. |
| if (use->x().value(this) != 0.0 || use->y().value(this) != 0.0) { |
| if (!cloneParent->hasAttribute(SVGNames::transformAttr)) { |
| String transformString = String::format("translate(%f, %f)", use->x().value(this), use->y().value(this)); |
| cloneParent->setAttribute(SVGNames::transformAttr, transformString); |
| } else { |
| String transformString = String::format(" translate(%f, %f)", use->x().value(this), use->y().value(this)); |
| const AtomicString& transformAttribute = cloneParent->getAttribute(SVGNames::transformAttr); |
| cloneParent->setAttribute(SVGNames::transformAttr, transformAttribute + transformString); |
| } |
| } |
| |
| ExceptionCode ec = 0; |
| |
| // For instance <use> on <foreignObject> (direct case). |
| if (isDisallowedElement(target)) { |
| // We still have to setup the <use> replacment (<g>). Otherwhise |
| // associateInstancesWithShadowTreeElements() makes wrong assumptions. |
| // Replace <use> with referenced content. |
| ASSERT(use->parentNode()); |
| use->parentNode()->replaceChild(cloneParent.release(), use, ec); |
| ASSERT(ec == 0); |
| return; |
| } |
| |
| RefPtr<Node> newChild = target->cloneNode(true); |
| |
| // We don't walk the target tree element-by-element, and clone each element, |
| // but instead use cloneNode(deep=true). This is an optimization for the common |
| // case where <use> doesn't contain disallowed elements (ie. <foreignObject>). |
| // Though if there are disallowed elements in the subtree, we have to remove them. |
| // For instance: <use> on <g> containing <foreignObject> (indirect case). |
| if (subtreeContainsDisallowedElement(newChild.get())) |
| removeDisallowedElementsFromSubtree(newChild.get()); |
| |
| SVGElement* newChildPtr = 0; |
| if (newChild->isSVGElement()) |
| newChildPtr = static_cast<SVGElement*>(newChild.get()); |
| ASSERT(newChildPtr); |
| |
| cloneParent->appendChild(newChild.release(), ec); |
| ASSERT(ec == 0); |
| |
| // Replace <use> with referenced content. |
| ASSERT(use->parentNode()); |
| use->parentNode()->replaceChild(cloneParent.release(), use, ec); |
| ASSERT(ec == 0); |
| |
| // Handle use referencing <svg> special case |
| if (target->hasTagName(SVGNames::svgTag)) |
| alterShadowTreeForSVGTag(newChildPtr); |
| |
| // Immediately stop here, and restart expanding. |
| expandUseElementsInShadowTree(m_shadowTreeRootElement.get()); |
| return; |
| } |
| } |
| |
| for (RefPtr<Node> child = element->firstChild(); child; child = child->nextSibling()) |
| expandUseElementsInShadowTree(child.get()); |
| } |
| |
| void SVGUseElement::expandSymbolElementsInShadowTree(Node* element) |
| { |
| if (element->hasTagName(SVGNames::symbolTag)) { |
| // Spec: The referenced 'symbol' and its contents are deep-cloned into the generated tree, |
| // with the exception that the 'symbol' is replaced by an 'svg'. This generated 'svg' will |
| // always have explicit values for attributes width and height. If attributes width and/or |
| // height are provided on the 'use' element, then these attributes will be transferred to |
| // the generated 'svg'. If attributes width and/or height are not specified, the generated |
| // 'svg' element will use values of 100% for these attributes. |
| RefPtr<SVGSVGElement> svgElement = new SVGSVGElement(SVGNames::svgTag, document()); |
| |
| // Transfer all attributes from <symbol> to the new <svg> element |
| svgElement->attributes()->setAttributes(*element->attributes()); |
| |
| // Explicitly re-set width/height values |
| String widthString = String::number(width().value(this)); |
| String heightString = String::number(height().value(this)); |
| |
| svgElement->setAttribute(SVGNames::widthAttr, hasAttribute(SVGNames::widthAttr) ? widthString : "100%"); |
| svgElement->setAttribute(SVGNames::heightAttr, hasAttribute(SVGNames::heightAttr) ? heightString : "100%"); |
| |
| ExceptionCode ec = 0; |
| |
| // Only clone symbol children, and add them to the new <svg> element |
| for (Node* child = element->firstChild(); child; child = child->nextSibling()) { |
| RefPtr<Node> newChild = child->cloneNode(true); |
| svgElement->appendChild(newChild.release(), ec); |
| ASSERT(ec == 0); |
| } |
| |
| // We don't walk the target tree element-by-element, and clone each element, |
| // but instead use cloneNode(deep=true). This is an optimization for the common |
| // case where <use> doesn't contain disallowed elements (ie. <foreignObject>). |
| // Though if there are disallowed elements in the subtree, we have to remove them. |
| // For instance: <use> on <g> containing <foreignObject> (indirect case). |
| if (subtreeContainsDisallowedElement(svgElement.get())) |
| removeDisallowedElementsFromSubtree(svgElement.get()); |
| |
| // Replace <symbol> with <svg>. |
| ASSERT(element->parentNode()); |
| element->parentNode()->replaceChild(svgElement.release(), element, ec); |
| ASSERT(ec == 0); |
| |
| // Immediately stop here, and restart expanding. |
| expandSymbolElementsInShadowTree(m_shadowTreeRootElement.get()); |
| return; |
| } |
| |
| for (RefPtr<Node> child = element->firstChild(); child; child = child->nextSibling()) |
| expandSymbolElementsInShadowTree(child.get()); |
| } |
| |
| #endif |
| |
| void SVGUseElement::attachShadowTree() |
| { |
| if (!m_shadowTreeRootElement || m_shadowTreeRootElement->attached() || !document()->shouldCreateRenderers() || !attached() || !renderer()) |
| return; |
| |
| // Inspired by RenderTextControl::createSubtreeIfNeeded(). |
| if (renderer()->canHaveChildren() && childShouldCreateRenderer(m_shadowTreeRootElement.get())) { |
| RefPtr<RenderStyle> style = m_shadowTreeRootElement->styleForRenderer(); |
| |
| if (m_shadowTreeRootElement->rendererIsNeeded(style.get())) { |
| m_shadowTreeRootElement->setRenderer(m_shadowTreeRootElement->createRenderer(document()->renderArena(), style.get())); |
| if (RenderObject* shadowRenderer = m_shadowTreeRootElement->renderer()) { |
| shadowRenderer->setStyle(style.release()); |
| renderer()->addChild(shadowRenderer, m_shadowTreeRootElement->nextRenderer()); |
| m_shadowTreeRootElement->setAttached(); |
| } |
| } |
| |
| // This will take care of attaching all shadow tree child nodes. |
| for (Node* child = m_shadowTreeRootElement->firstChild(); child; child = child->nextSibling()) |
| child->attach(); |
| } |
| } |
| |
| void SVGUseElement::transferEventListenersToShadowTree(SVGElementInstance* target) |
| { |
| if (!target) |
| return; |
| |
| SVGElement* originalElement = target->correspondingElement(); |
| ASSERT(originalElement); |
| |
| if (SVGElement* shadowTreeElement = target->shadowTreeElement()) { |
| if (RegisteredEventListenerList* localEventListeners = originalElement->localEventListeners()) { |
| RegisteredEventListenerList::Iterator end = localEventListeners->end(); |
| for (RegisteredEventListenerList::Iterator it = localEventListeners->begin(); it != end; ++it) { |
| EventListener* listener = (*it)->listener(); |
| ASSERT(listener); |
| |
| // Event listeners created from markup have already been transfered to the shadow tree during cloning! |
| if (listener->wasCreatedFromMarkup()) |
| continue; |
| |
| shadowTreeElement->addEventListener((*it)->eventType(), listener, (*it)->useCapture()); |
| } |
| } |
| } |
| |
| for (SVGElementInstance* instance = target->firstChild(); instance; instance = instance->nextSibling()) |
| transferEventListenersToShadowTree(instance); |
| } |
| |
| void SVGUseElement::associateInstancesWithShadowTreeElements(Node* target, SVGElementInstance* targetInstance) |
| { |
| if (!target || !targetInstance) |
| return; |
| |
| SVGElement* originalElement = targetInstance->correspondingElement(); |
| |
| if (originalElement->hasTagName(SVGNames::useTag)) { |
| #if ENABLE(SVG) && ENABLE(SVG_USE) |
| // <use> gets replaced by <g> |
| ASSERT(target->nodeName() == SVGNames::gTag); |
| #else |
| ASSERT(target->nodeName() == SVGNames::gTag || target->nodeName() == SVGNames::useTag); |
| #endif |
| } else if (originalElement->hasTagName(SVGNames::symbolTag)) { |
| // <symbol> gets replaced by <svg> |
| #if ENABLE(SVG) && ENABLE(SVG_USE) && ENABLE(SVG_FOREIGN_OBJECT) |
| ASSERT(target->nodeName() == SVGNames::svgTag); |
| #endif |
| } else |
| ASSERT(target->nodeName() == originalElement->nodeName()); |
| |
| SVGElement* element = 0; |
| if (target->isSVGElement()) |
| element = static_cast<SVGElement*>(target); |
| |
| ASSERT(!targetInstance->shadowTreeElement()); |
| targetInstance->setShadowTreeElement(element); |
| |
| Node* node = target->firstChild(); |
| for (SVGElementInstance* instance = targetInstance->firstChild(); node && instance; instance = instance->nextSibling()) { |
| // Skip any non-svg elements in shadow tree |
| while (node && !node->isSVGElement()) |
| node = node->nextSibling(); |
| |
| associateInstancesWithShadowTreeElements(node, instance); |
| node = node->nextSibling(); |
| } |
| } |
| |
| SVGElementInstance* SVGUseElement::instanceForShadowTreeElement(Node* element) const |
| { |
| return instanceForShadowTreeElement(element, m_targetElementInstance.get()); |
| } |
| |
| SVGElementInstance* SVGUseElement::instanceForShadowTreeElement(Node* element, SVGElementInstance* instance) const |
| { |
| ASSERT(element); |
| ASSERT(instance); |
| ASSERT(instance->shadowTreeElement()); |
| |
| if (element == instance->shadowTreeElement()) |
| return instance; |
| |
| for (SVGElementInstance* current = instance->firstChild(); current; current = current->nextSibling()) { |
| SVGElementInstance* search = instanceForShadowTreeElement(element, current); |
| if (search) |
| return search; |
| } |
| |
| return 0; |
| } |
| |
| void SVGUseElement::transferUseAttributesToReplacedElement(SVGElement* from, SVGElement* to) const |
| { |
| ASSERT(from); |
| ASSERT(to); |
| |
| to->attributes()->setAttributes(*from->attributes()); |
| |
| ExceptionCode ec = 0; |
| |
| to->removeAttribute(SVGNames::xAttr, ec); |
| ASSERT(ec == 0); |
| |
| to->removeAttribute(SVGNames::yAttr, ec); |
| ASSERT(ec == 0); |
| |
| to->removeAttribute(SVGNames::widthAttr, ec); |
| ASSERT(ec == 0); |
| |
| to->removeAttribute(SVGNames::heightAttr, ec); |
| ASSERT(ec == 0); |
| |
| to->removeAttribute(XLinkNames::hrefAttr, ec); |
| ASSERT(ec == 0); |
| } |
| |
| } |
| |
| #endif // ENABLE(SVG) |
